Job tip #1
Be prepared to interview at any time. I just recieved an assignment from my boss stating that I have to bring him x amount of qualified candidates by the end of the week. That means, I don't have time to say "hi, I like your resume, let's schedule an interview for next week." No you need to be prepared to interview as soon as you submit a resume.
Job tip #2
If your interview is over the telephone, always have your resume in front of you. More than likely you will need to confirm places of employment, dates, duties, etc. Never ever tell the interviewer "I don't see why I need to give you my employment information over the phone when I already filled out a resume/application online." The fact of the matter is, you don't need to see why you need to give that information over the phone, JUST DO IT or risk your resume being dumped in the trash bin.
Job tip #3
Make sure you have read the job description and done some research on the company as well. Its not hard, just surfing around the company website will suffice. Believe it or not, sometimes the company will give you vital information about themselves in the job description such as what they specialize in, whether or not they're a Fortune 500 company, and how they're growing.
Job tip #4
Maintain a pleasant and positive attitude throughout the interview. You're probably thinking, all the job candidates that I'm competing with already know this and are doing this. Believe it or not, half the time job candidates are rude, unpleasant and unprofessional. Just by being friendly and displaying your good communication skills, you've already beaten half your competition. You'll be surprised at how many instances a candidate has gotten the job over more qualified candidates simply because the candidate won the interviewer over with his/her personality and the interviewer subsequently enjoyed interviewing that person, especially after having interviewed two rude idiots before him/her.